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Alibaba Big data ACA Big Data Certification Exam

ACA Big Data Certification Exam

Last Update Apr 3, 2025
Total Questions : 78

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Questions 2

In a scenario where a large enterprise plans to use MaxCompute to process and analyze its data, tens

of thousands of tables and thousands of tasks are expected for this project, and a project team of 40

members is responsible for the project construction and O&M. From the perspective of engineering,

which of the following can considerably reduce the cost of project construction and management?

Score 2

Options:

A.  

Develop directly on MaxCompute and use script-timed scheduling tasks

B.  

Use DataWorks

C.  

Use Eclipse

D.  

Use a private platform specially developed for this project

Discussion 0
Questions 3

_______ instances in E-MapReduce are responsible for computing and can quickly add computing

power to a cluster. They can also scale up and down at any time without impacting the operations of the

cluster.

Score 2

Options:

A.  

Task

B.  

Gateway

C.  

Master

D.  

Core

Discussion 0
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Questions 4

A company originally handled the local data services through the Java programs. The local data have

been migrated to MaxCompute on the cloud, now the data can be accessed through modifying the Java

code and using the Java APIs provided by MaxCompute.

Score 1

Options:

A.  

True

B.  

False

Discussion 0
Questions 5

A distributed file system like GFS and Hadoop are design to have much larger block(or chunk) size

like 64MB or 128MB, which of the following descriptions are correct? (Number of correct answers: 4)

Score 2

Options:

A.  

It reduces clients' need to interact with the master because reads and writes on the same block( or

chunck) require only one initial request to the master for block location information

B.  

Since on a large block(or chunk), a client is more likely to perform many operations on a given block, it

can reduce network overhead by keeping a persistent TCP connection to the metadata server over an

extended period of time

C.  

It reduces the size of the metadata stored on the master

D.  

The servers storing those blocks may become hot spots if many clients are accessing the same small

files

E.  

If necessary to support even larger file systems, the cost of adding extra memory to the meta data

server is a big price

Discussion 0
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78
2025-03-03
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